Reports until 16:25, Tuesday 07 January 2014
H1 SUS
betsy.weaver@LIGO.ORG - posted 16:25, Tuesday 07 January 2014 (9142)
Ey re-fiber welding preps - status

Today we were frought with more fiber pulling issues.  After sorting user errors with the profile math yesterday, today the fiber puller was cranky.  The latest problem this afternoon was that a piece of the mechanics on the bottom stage of the puller pulled out of place (a problem that has been seen before).  It will (again) take a few hours of their time to fix tomorrow.

 

Meanwhile at EY, Jason and I repositioned the UIM and PUM in prep for the rewelding scheduled for later this week.  When we went to position the test mass, Jason discovered that the HR return beam was very faint and the autocollimator could not get a reading off of it.  LLO reported this finding when they did their ETM.  We will pull the First Contact thin alignment sheet down a bit and try see if that improves the visability.  Otherwise, we may entertain the idea of sighting off of the AR surface for pointing which has a much better return for the 670nm autocol beam.

 

Oh, and the cookie cutter for repositioning the ETMy QUAD upper structure on the ISI appears to have been machined incorrectly.  I have time to fix it.